Pressure-regulator.



S. UDSTAD.

PRESSURE REGULATOR.

APPLICATION FILED SEPT. 12. 1913.

Patented Aug.18, 119m l mma o SIVERT UDSTAD, 0F AURORA, ILLINOIS.

PRESSURE-REG-U'LATOE.

Specification of Letters Patent.

Patented na is, rare.

Application filed September 12, 1913. Serial No. 789,454.

To all whom it may concern:

Be 1t known that I, Sivnn'r UDSTAD, a citizen of the United States, andresident of Aurora, county of Kane, and State of Illinois, have inventedcertain new and useful Improvements in Pressure-Regulators, of which thefollowing is a specification, and which are illustrated in theaccompanying drawings, forming a part thereof.

The invention relates to pressure regulators and more particularly tothose of the form comprising a pair of oppositely opening valves, onebeing yieldingly held to its seat with sufficient force for maintainingthe desired pressure and being opened for the escape of fluid when thatpressure is exceeded and the other being opened to permit the admissionof fluid to the pressure cham ber when the pressure is reduced.

The invention contemplates a pressure regulator of the type describedwherein the two valves are associated together in a unitary structure.

The object of the invention is to provide a pressure regulator whichshall be of simple and inexpensive construction and reliable inoperation.

ln the accompanying drawings, Figure 1 is a central section view of onetorm of pressure regulator embodying the improvements provided by theinvention, some of the parts being broken away. Fig. 2 is similar toFig.

'1 but shows a dilferent style of pressure regulator embodying theimprovements provided by the invention. Fig. 3 is a plan view of thepressure regulator illustrated in Fig. 2.

Referring to Fig. 1 of the drawings the regulator there shown preferablycomprises a tubular casing 10, having one end threaded as at 11, toreceive a tubular cap, 12. Preferably the opposite end of the casing 10,and the bore of the cap, 12, have threaded sockets, as 13, 1 1, forconnection with the pipes of a fluid pressure system. As shown, thesocket, 13, may be directly connected with one of the pipes of adomestic hot water heating system and the socket, 14, may be connectedto a water supply. valve seat 15 is provided intermediate the ends ofthe casing 10, and an outwardly opening valve 16 cooperates with suchseat.

lfn carrying out the invention the stem 17 of the valve 16 is madetubular, and is provided intermediate its ends with a valve seat 18. .Aninwardly opening valve 19 oo'riperates with the valve seat 18. As shown,the bore 20 of the tubular stem 17 of the valve 16 extends through thevalve 16 and has lateral openings 21 which communicate with the bore ofthe casing 10 beyond the valve. Preferably the outer wall of the valvestem 1? 1S ribbed, as at 22, and these ribs slidingly engage the wallofthe casing 10 to guidedly support the valve 16 while still permittingthe passage of fluid through the bore of the casing when the valve 16 israised from its seat. Likewise the stem 23 of the valve 19 is providedwith longitudinal ribs 24, and these ribs slidingly engage the wall ofthe bore of the tubular valve stem 17 to guidedly support the valve 19,while still permitting the passage of fluid through the bore of thevalve stem 17 when the valve 19 is opened.

Preferably the valves 16 and 19 are each yieldingly held to their seatsby a spring, as 25, 26. llhe spring 25 is desirably made sufficientlystifi to hold the valve 16 to its seat against the pressure desiredto-be maintained in front of the valve. The spring 26 on the other hand,is desirabl a light spring, and permits the opening 0 the valve 19 forthe admission of fluidinto the space in front of the valve 16 when thepressure in said space is reduced below that in the space in rear of orabove the valve 16. When the apparatus is used in connection with adomestic hot water heating system, the valve 16 will be opened to permittheescape of water in the system if the pressure in the system is increased above a predetermined amount by the expansion of the water dueto its rise in temperature. The valve 19 will be opened to permit theadmission of water to the sys; tern when the pressure in the system isreduced by the contraction of the water due to a reduction of itstemperature.

The valves 16 and 19 preferably have oppositely extending stems 27 and28, about which the springs 25 and 26 are respectively coiled. llhesestems conveniently slide through spiders 29 and 30, respectively. Thesespiders serve as abutments for the springs 25, 26. To permit adjustmentof the spring 25 the spider 29 has threaded engagement with the walhofthe casing 10 in front of the cap 12. Similarly to permit adjustment ofthe tension of the spring 26, the spider 30 has threaded enga unent withthe bore of the tubular stem 1'? adjacent the inner end of the stem, as31.

the valve 16 In the form of construction illustrated in Figs. 2 and 3, acasing 32 is provided, having a seat 33 for the valve 16 and threadedsockets. 34, 35 at opposite sides of the valve for connection with apressure chamber and reservoir, respectively, which are offset from theline of the valve seat 33., Openings 36 and 37 in the wall of the casing32 at opposite sides of the valve seat 33 serve, respectively, forreceiving a drain cock 38 and to provide an apening through which thevalve 16 and its appurtenances may be removed. In this instance the wallof the opening 37 is threaded to receive a spider 29, as also a solidcap 39.

The form of construction illustrated in Fig. 1 will be convenientlyusedin places where the amount of space available is limited. The formof construction illustrated in Figs. 2 and 3 provides for the removal ofthe valve 16 and its appurtenances for inspection and repair withoutdisconnecting the parts which are connected to the sockets 3a and 35,and will conveniently be used where thespace occupied by a casing of theform here shown is readily available. Either form of apparatus may beused in connection with asteam boiler, the valve 16 then serving as asafety valve to permit the escape of steam in event a pre-determinedpressure is exceeded. On the other hand, the valve 19 will serve as arelief valve to prevent the formation of a vacuum in the boiler when thesteam condenses, as by the cooling off of the boiler. The harmful effectof the production of a vacuum within a steam boiler, when the boiler ispermitted to cool off rapidly, is thus prevented. Similarly theapparatus may be used as a pres sure regulator for any fluid, eitherliquid, as water, or gases, as steam or air.

I claim as my invention,

1. In a pressure re ulator, in combination, an axially mova le valvehaving an inwardly extended tubular stem, the bore of the stem beingcontinued through the valve, a second valve sliding in the bore of thestem intermediate its ends and controlling the opening therethrough, aspider running in the bore of the said stem beyond the second mentionedvalve from the first mentioned valve and having threaded engagement withthe wall of the said stem and a spring reacting between the spider andthe second mentioned valve.

2. In a pressure regulator, in combination, a tubular casing having avalve seat intermediate its ends, a valve cooperating with the said seatand having a tubular stem, the bore of the stem being extended throughthe valve, a second valve sliding in the bore of the said stem andcontrolling the opening therethrough, the two valves acting in oppositedirections, a pair of guiding and pressure regulating plates one havingthreaded engagement with the wall of the case in front of the firstmentioned valve and the other having threaded engagement with the stemof the first mentioned valve in front of the second mentioned valve anda spring reacting between each of the said guiding and pressureregulating plates and the corresponding valve.

3. In a pressure regulator, 1n combination, a chambered casing having avalve seat intermediate its ends, an opening in its wall directly abovethe valve seat, and a pair of axially alined oppositely facing socketsfor the connection of fluid pipes, one at each side of the valve seat,the line of said sockets being offset from the line of the valve seatand opening, a removable cap covering the said opening, and a pair ofoppositely acting valves, one cooperating w th the said valve seat andhaving an opening therethrough and the other cont-rolling the opening inthe said valve which is provided with an opening, both of said valvesbeing removable through the said opening in the wall of the case uponremoval of the said cap.

SIVERT UDS'IAD.

Witnesses:

CHARLES B. GILLsoN, E. M. KLA'rcnER.

